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STATIC ELECTRICITY; NATURALLY-OCCURRING ELECTRICITY (electrostatic machines H02N; uses of electricity in performing operations, e.g. precipitation, see the relevant subclasses for the operations)
Definition statement
This subclass/group covers:

Means for preventing the formation of or removal of electrostatic charges in general, not otherwise provided for.

Using naturally-occurring electricity (e.g. lightning)

Relationship between large subject matter areas

As more and more the protection from and the removal of electrostatic charges have become critical in many systems and devices, subclasses have been created in many areas incorporating the scope of H05F, rendering this subclass the last appropriate place for classification.

Spark gaps, sparking plugs and corona discharge devices are classified in subclass H01T.

Electrostatic machines are classified in H02N.

References relevant to classification in this subclass
This subclass/group does not cover:
Installations of lightning conductors; Fastening thereof to supporting structure

Specific applications of methods or arrangements for preventing the formation of static electricity or for carrying off these charges after their formation. For example:

Garments protecting against electric shocks or static electricity
Footwear with earthing or grounding means
Carrying off electrostatic charges from living beings
Electric elements specially adapted for carrying off electrostatic charges from vehicles
Static discharge and lightning protection for aircraft
Arrangements in large containers
Structural protection against electrostatic charges or discharges for semiconductor devices
Protective earth or shield arrangements on coupling devices
Devices providing for corona discharge
Screening of printed circuits or components thereof against electric or magnetic fields
Informative references
Attention is drawn to the following places, which may be of interest for search:
Domestic cleaning implements functioning electrostatically
Cleaning by electrostatic means
Apparatus for electrographic processes using a charge pattern
Electrostatic machines
Glossary of terms
In this subclass/group, the following terms (or expressions) are used with the meaning indicated:
Corona discharge or brush discharge
Discharge from a conductor when the potential difference between it and its surroundings exceeds a certain value but is not enough to cause a spark or an arc.
Spark gaps
Enclosed or non-enclosed discharge devices having cold electrodes and used exclusively to discharge a quantity of electrical energy in small time duration.
Coupling devices
Devices having two or more parts specially adapted so as to be capable of ready and repeated physical engagement or disengagement, without the use of a tool for the purpose or establishing or breaking an electrical path.
Electrostatic charge
They are used as synonyms for the electric charge at rest on the surface of an insulator or insulated body.
Preventing the formation of electrostatic charges
Definition statement
This subclass/group covers:

Means that prevent or suppress electrostatic charge build-up.

References relevant to classification in this group
This subclass/group does not cover:
Antistatic elements in semiconductor handling
Antistatic coating in cathode/electron tubes
Informative references
Attention is drawn to the following places, which may be of interest for search:
Antistatic materials
Treatment of fabrics
Carrying-off electrostatic charges ( {from shoes A43B 7/36} ; from living beings A61N 1/14; {from tyres B60C 19/08; from vehicles B60R 16/06; from aircraft B64D 45/02; from large containers B65D 90/46} )
Definition statement
This subclass/group covers:

Residual main group for removing electrostatic charges not provided elsewhere.

References relevant to classification in this group
This subclass/group does not cover:
Chemical processes involving electrical discharges
Electrostatic spraying
Purifying air by electrostatic fields
Devices providing for corona discharge
Apparatus for generating ions into the atmosphere

Examples of places where the subject matter of this group is covered when specially adapted, used for a particular purpose, or incorporated in a larger system:

(removal of or protection from electrostatic charge, rec)

Rec in footwear
Grounding means for footwear
Rec in chairs, beds
Rec in electrotherapy
Rec in tyres
Rec in vehicles
Rec in aircrafts
Rec in transfer of liquids from bulk storage into vehicles or smaller containers
Antistatic layers in flexible sheet materials
Rec in semiconductors
Rec in electric connectors
Rec in electronic devices
Rec from sheets, webs
Informative references
Attention is drawn to the following places, which may be of interest for search:
Conductive hoses
Use of naturally-occuring electricity, { e.g. lightning or static electricity}
Definition statement
This subclass/group covers:

Recovery and use of naturally-occurring electricity or electrostatic charge, ex., lightning.

Relationship between large subject matter areas

When the subject matter is the machine (normally a generator) that receives natural electrostatic charge and produces electric energy, H02N 1/00 or H02N 11/00 are relevant.

References relevant to classification in this group
This subclass/group does not cover:
Devices or methods for influencing weather
Screening atmospheric or terrestrial radiations or fields
Lighter-than-air aircrafts (ex balloons)
Measurements related to lightning
Measuring atmospheric potential differences
Installation of lightning conductors
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Last Modified: 10/11/2013